# fluent vulnerabilities & exploitation

> As of 2026-10-23, Threadlinqs tracks 6 fluent CVEs, 0 in the CISA Known Exploited Vulnerabilities catalog, linked to 1 tracked threat campaign.

**Data as of:** 2026-10-23

## Exploitation timeline

Threadlinqs has recorded 6 fluent CVEs published between 2021-10-15 and 2026-07-15. The busiest month was 2026-07 (4 new CVEs). None of them is listed in CISA KEV yet.

## Most exploited vulnerabilities

Ranked with CISA KEV listings first, then EPSS exploit probability, then CVSS score. Showing 6 of 6 tracked fluent CVEs.

- [CVE-2022-39379](https://intel.threadlinqs.com/cve/CVE-2022-39379) — LOW 3.1 · EPSS 45% · 2022-11-02
- [CVE-2021-41186](https://intel.threadlinqs.com/cve/CVE-2021-41186) — MEDIUM 5.9 · EPSS 2.2% · 2021-10-29
- [CVE-2026-44024](https://intel.threadlinqs.com/cve/CVE-2026-44024) — CRITICAL 9.8 · EPSS 1.1% · 2026-07-08
- [CVE-2026-44160](https://intel.threadlinqs.com/cve/CVE-2026-44160) — HIGH 7.5 · EPSS 0.6% · 2026-07-08
- [CVE-2026-44025](https://intel.threadlinqs.com/cve/CVE-2026-44025) — HIGH 7.5 · EPSS 0.5% · 2026-07-08
- [CVE-2026-44161](https://intel.threadlinqs.com/cve/CVE-2026-44161) — HIGH 7.2 · EPSS 0.4% · 2026-07-08

## Products affected

Threadlinqs normalises CPE and CNA product records across all 6 CVEs; 1 distinct fluent product is affected. The most frequently affected:

- fluentd — 6 CVEs

## Threat activity

1 tracked threat campaign reference fluent products or exploit fluent CVEs:

- [Multiple Fluentd Vulnerabilities: RCE via Tag Placeholder (CVE-2026-44024), Info Disclosure (CVE-2026-44025), Decompression Bomb DoS (CVE-2026-44160), and SSRF (CVE-2026-44161)](https://intel.threadlinqs.com/threat/TL-2026-1041) — HIGH — 2026-07-01

## How to prioritise fluent patching

This order follows the data Threadlinqs holds for fluent, not a generic severity checklist:

- No fluent CVE is in CISA KEV yet, so rank by exploit probability instead.
- Outside KEV, the highest EPSS scores are [CVE-2022-39379](https://intel.threadlinqs.com/cve/CVE-2022-39379) (45%), [CVE-2021-41186](https://intel.threadlinqs.com/cve/CVE-2021-41186) (2.2%), [CVE-2026-44024](https://intel.threadlinqs.com/cve/CVE-2026-44024) (1.1%).
- 1 CVE scores Critical and 3 High on CVSS v3 (maximum 9.8, average 6.8); sequence these after KEV and high-EPSS items.
- 1 CVE has a public exploit or proof of concept recorded, which shortens the time from disclosure to attack.

## About this data

Vendor attribution comes from the CNA and CPE product records of each CVE, folded to one vendor name; CVSS, EPSS and KEV status are read from the Threadlinqs CVE catalog; campaign and actor links come from tracked threat records. Counts reflect the data as of 2026-10-23 and refresh daily.

Canonical: https://intel.threadlinqs.com/vendors/fluent
All vendors: https://intel.threadlinqs.com/vendors
Full detection coverage and IOCs via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp